We have listed here a few mistakes that travelers may usually make to help you avoid the same things when you apply for a visa on arrival to Vietnam.
#1 - Visa on arrival at the border: Visa on arrival works for air travel only, it means there is no on arrival visa for overland/border crossing or sea/water entry. So, in case you do not enter Vietnam by air, just make sure you have the visa in advance.
#2 - Spelling/Typo mistakes: Many applicants fill in the Application form with WRONG details: full name on passport, passport number or date of birth. Normally, that may not be a big problem, however, in some cases; they will be refused by the airline at the departure airport since the information on the letter of approval does not match those in the passport. So, make sure you enter everything correctly and carefully.
#3 - Arrival date: Many people think that the visa validity will start from the date they enter Vietnam, not from the date they provide, however, it is not. The visa validity will commence from the date you provide in advance, not from the date you will enter the country. So, just make sure that you make a clear plan of when to enter before ordering a visa to Vietnam.
#4 - Visa extension: Many people think that it is easy to extend a visa once they are in Vietnam, however, in fact, it is not that easy, and extending a visa may be a costly and time consuming process. So, if possible, just apply for a 3 month visa in advance instead of a 1 month one to save money on visa extension.
We do believe that what we have written here will not be a complete list of mistakes, if you wish to share/add up something, you are welcome at email@example.com.